Apple Intelligence Hardware Requirements for iOS 18

Apple Intelligence brings on-device generative AI features to iOS 18, but running these large language and diffusion models locally requires specific, modern hardware. To process tasks natively without relying on cloud computation, your iPhone must meet strict requirements regarding processing power, memory bandwidth, and unified RAM capacity. Below is a detailed breakdown of the exact hardware specifications required to run Apple Intelligence natively.

Minimum RAM: 8 GB Unified Memory

The primary hardware bottleneck for Apple Intelligence is random-access memory. Apple requires a minimum of 8 GB of unified memory to run its foundational models on-device. The models—which handle text summarization, proofreading, notification priorities, and image generation—remain resident in memory to respond with low latency. Devices with 6 GB of RAM (such as the standard iPhone 15 and 15 Plus) cannot allocate sufficient memory to keep the system, background processes, and AI models running simultaneously.

Processor: Apple A17 Pro or Newer

To execute generative AI models efficiently, the device must feature at least an Apple A17 Pro chip or any chip from the A18 family. These system-on-chips (SoCs) include:

  • Advanced CPU and GPU Architecture: High memory bandwidth and modern instruction sets designed to handle complex algorithmic workloads.
  • 16-Core Neural Engine (NPU): The A17 Pro and A18 chips feature a 16-core Neural Engine capable of processing up to 35 trillion operations per second (TOPS). This dedicated silicon processes INT4 and INT8 quantized models without draining excessive battery or throttling the central processor.

Storage Space

On-device AI models require local storage space to store weights and parameter files:

  • Internal Storage Footprint: Users need approximately 4 GB of available local storage reserved specifically for downloading and caching the Apple Intelligence on-device model files upon enabling the feature.

Supported iPhone Models

Because of the combination of the 8 GB RAM threshold and the A17 Pro/A18 processor requirement, native Apple Intelligence on iOS 18 is limited to the following handsets:

  • iPhone 15 Pro
  • iPhone 15 Pro Max
  • iPhone 16
  • iPhone 16 Plus
  • iPhone 16 Pro
  • iPhone 16 Pro Max

Any iPhone model released prior to the iPhone 15 Pro line lacks the necessary memory and Neural Engine throughput to run Apple Intelligence models natively.